The topic “Addition with Unknowns” introduces children to the concept of unknowns in addition problems, enhancing their problem-solving and critical-thinking skills. By analyzing and applying the idea of unknowns, children learn to approach addition problems within 20 where one or more values are not specified. This understanding fosters flexibility in thinking as they explore different positions for the unknowns within equations. Additionally, children will practice adding three whole numbers up to 20, reinforcing their foundational addition skills and enabling them to solve more complex story problems. This exploration of unknowns prepares children to handle variables in future mathematical concepts and encourages them to see addition as a dynamic process that can be represented in various ways, including through objects, drawings, and equations. Overall, this topic promotes a deeper comprehension of addition and its application in real-world situations.